This is a Genuine Omega Rubber O-ring to fit the c.1861 Sapphire Case Back Movement Ring for the Speedmaster Manual Wind Moon Watch Movement, fits case 145.022, 145.012, 3570.50 model etc including current model.
These are Omega supplied service parts for the c.1861 manual wind moon watch case, they will fit most variants of this movement c.1863 c.861 c.863.
You also require the movement ring if you don't have it.
These are fitted to the 145.022 42mm SPEEDMASTER Moon Watch case if you have a sapphire case back but will fit all other models all the way back to the 1960's.
Omega Speedmaster O-ring for c.1861 Sapphire Movement Ring for case 145.022 etc
Items can only be returned if either faulty, in the case of the item not being required then it must be returned exactly as received. For example if the item is new in a sealed packet and/or has protective covers in place then it must be returned the same otherwise item is no longer new and the value is greatly reduced, these items can only be returned/refunded by agreeing a lower value with Swiss Limited Editions before returning reflecting the new lower value of the item.